Product Description
Product Details of Manual Soft - Sealed Wafer - Type Butterfly Valve
I. Basic Attributes
(I) Category and Structure
It belongs to a manual soft - sealed wafer - type butterfly valve, adopting a wafer - type connection. It consists of a handle, a valve stem, a valve body, a butterfly plate, and a soft - sealed valve seat (made of rubber). The handle rotation drives the valve stem, which in turn makes the butterfly plate rotate around the valve stem axis. By changing the relative position between the butterfly plate and the valve seat, it realizes the on - off control and flow regulation of the pipeline medium. The soft - sealed valve seat fits the butterfly plate, and its sealing performance is ensured by the elasticity of the rubber, which is suitable for general working conditions.
(II) Application Scenarios
It is widely used in pipeline systems of municipal water supply and drainage, building heating, ventilation and air - conditioning (HVAC), industrial circulating water, sewage treatment, food and beverage (non - extreme corrosion and hygiene requirements), light chemical industry, etc. It can transport media such as clean water, sewage, air, hot water, steam (medium - low temperature, depending on the temperature resistance of the rubber valve seat), and weakly corrosive liquids (such as dilute solutions of weak acids and weak alkalis), and is used for (shut - off) and flow regulation functions.
II. Performance Parameters
(I) Nominal Diameter
Commonly covers specifications such as DN40 - DN300 (e.g., DN50, DN65, DN80, DN100, etc.), which can adapt to the connection requirements of pipelines with different diameters, meeting the applications from small - scale equipment connections to large - scale pipeline network systems.
(II) Nominal Pressure
Generally covers medium - low pressure levels such as PN10 and PN16 (suitable for municipal, civil, and general industrial medium - low pressure pipelines. Excessively high pressure may affect the service life and reliability of the soft seal).
(III) Test Pressure
- Shell Test Pressure: Usually 1.5 times the nominal pressure (e.g., for PN10, the shell test pressure is 15 bar; for PN16, it is 24 bar). It is used to test the pressure - bearing strength of the valve body, verify the casting and processing quality of the valve body, and prevent the valve body from cracking and leaking under pressure conditions.
- Seal Test Pressure: Generally 1.1 times the nominal pressure (e.g., for PN10, the seal test pressure is 11 bar; for PN16, it is 17.6 bar). It ensures the sealing effect between the valve seat and the butterfly plate through pressure testing and controls the medium leakage rate.
(IV) Applicable Temperature
Determined by the rubber material of the soft - sealed valve seat. For a conventional EPDM (Ethylene - Propylene - Diene Monomer) valve seat, the applicable temperature is approximately - 15°C - + 120°C; if special rubbers such as heat - resistant EPDM or silicone rubber are used, it can adapt to a temperature range of - 15°C - + 150°C or even higher (the corresponding temperature - resistant rubber should be selected according to the actual working conditions). However, high temperatures will accelerate rubber aging and affect the sealing service life.
III. Material Configuration
(I) Valve Body
Mostly made of ductile iron (commonly used), gray cast iron. For some high - end or corrosion - resistant scenarios, carbon steel or stainless steel (such as 304, 316) can be selected. Ductile iron/gray cast iron has a high cost - performance ratio and good castability and processability, meeting general non - strong corrosion and medium - low pressure working conditions; stainless steel is suitable for weakly corrosive media (such as in the food and beverage, pharmaceutical industries) and improves the corrosion resistance of the valve body.
(II) Butterfly Plate
Common materials include ductile iron (with surface electroplating or spraying treatment) and stainless steel (304, 316, etc.). Ductile iron is economical and practical, and its corrosion resistance can be enhanced through surface treatment; the stainless steel butterfly plate has excellent corrosion resistance and is suitable for corrosive media or scenarios with high hygiene requirements (such as food, medicine).
(III) Valve Stem
Usually made of stainless steel (such as 304), which balances strength and corrosion resistance, prevents the valve stem from rusting and jamming, and ensures the stability and smoothness of the handle driving the butterfly plate to rotate.
(IV) Soft - Sealed Valve Seat
The main materials are EPDM (suitable for various media, with good weather resistance and oxidation resistance), NBR (Nitrile - Butadiene Rubber, suitable for oil - based media), FKM (Fluoroelastomer, resistant to strong corrosion and high temperature, but with high cost), etc. The corresponding rubber should be selected according to the chemical properties, temperature, and pressure of the transported medium to ensure the sealing performance and service life.
IV. Product Advantages and Features
(I) Operation and Control
- Convenience: Manual handle operation, 90° rotation for quick opening and closing, small operating torque, labor - saving, no need for an additional power source, suitable for scenarios without automation requirements or for standby manual control.
- Regulation: The opening degree of the butterfly plate is controlled by the rotation angle of the handle, realizing continuous flow regulation (e.g., 0° - 90° corresponds to the medium changing from fully closed to fully open), meeting the simple flow regulation requirements.
(II) Sealing and Durability
- Advantages of Soft Seal: The rubber valve seat elastically fits the butterfly plate, with reliable sealing (low leakage rate under normal working conditions, meeting the requirements of standards such as GB/T 13927). The buffering effect of rubber can reduce the impact of pipeline vibration and water hammer on the valve, protecting the valve and pipeline system.
- Service Life Consideration: Although the rubber valve seat has problems of aging and wear, under normal working conditions (clean medium, suitable temperature and pressure), with reasonable maintenance (regular inspection and replacement of seals), a relatively long service life can be guaranteed; metal parts (valve body, butterfly plate, valve stem) are optimized in material and surface - treated, with corrosion resistance and wear resistance, improving the overall durability.
(III) Installation and Adaptability
- Flexible Installation: Wafer - type connection, no need for additional flange length, can be installed in pipelines at any spatial position (horizontal, vertical), saving installation space and reducing the difficulty of pipeline layout.
- Wide Adaptability: Different materials and specifications are available, adapting to various pipeline diameters, pressures, and medium working conditions, and can be applied from civil building water supply and drainage to general industrial pipeline systems.
V. Standards and Certifications
(I) Compliance Standards
- Domestic Standards: Complies with GB/T 12238 - 2008 General Valves - Flanged and Wafer Type Butterfly Valves and JB/T 8527 - 1997 Metal Sealing Butterfly Valves (the design and manufacture of soft - sealed butterfly valves also refer to the general butterfly valve standard system), ensuring product performance, dimensional interchangeability, and installation adaptability.
- International Standards: Some manufacturers' products comply with international standards such as BS EN 593:2008 Industrial valves - Butterfly valves and API 609 (American standard), meeting the requirements of export and foreign - related projects and ensuring compatibility with international pipeline systems.
(II) Qualification Certifications
- The manufacturing enterprise generally passes the ISO 9001 quality management system certification. Some products obtain certificates such as the special equipment manufacturing license (pressure pipeline components),(for drinking water systems), CE certification (for export to the European Union), and FDA certification (for the food and pharmaceutical industries, if applicable), verifying quality compliance and applicability in specific industries.
VI. Installation and Maintenance Points
(I) Installation
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Wafer - Type Installation Process:
- Pipeline Preparation: Clean the flange surface of the pipeline to be installed, ensure no impurities and burrs, and align the flange bolt holes.
- Valve Positioning: Place the valve between two flanges, align the valve bolt holes with the pipeline flange holes, and keep the butterfly plate in a half - open state (to prevent damage to the sealing surface during installation).
- Bolt Tightening: Insert the bolts, and use a wrench to symmetrically and step - by - step tighten the nuts (to avoid uneven force on the valve body and deformation). Ensure that the valve and the flange fit closely without deviation.
- Commissioning and Inspection: After installation, manually operate the handle to check the flexibility of the butterfly plate opening and closing, and test the sealing performance (pressure testing or visual inspection of leakage can be used).
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Special Notes: Pay attention to the medium flow direction during installation (generally, there is no strict flow direction requirement for the butterfly valve, but some manufacturers' products have recommended flow directions, which should be followed according to the instructions); if used in a vertical pipeline, it is recommended to install the handle in a convenient - to - operate position (such as the side, top).
(II) Maintenance
- Daily Inspection: Regularly (e.g., monthly) check the sealing leakage of the valve (between the valve seat and the butterfly plate, at the valve stem), check the flexibility of the handle operation (no jamming or loosening), and clean the dust and impurities on the valve body surface.
- Maintenance Operations:
- Seal Replacement: If the rubber valve seat ages or wears and causes leakage, close the upstream and downstream valves (or take pipeline interception measures), disassemble the valve, and replace it with a rubber valve seat of the same specification and suitable for the medium (pay attention to keeping the sealing surface clean and free of damage during installation).
- Valve Stem Maintenance: If there is leakage at the valve stem, check the packing (if any) or the sealing structure, tighten the packing gland or replace the sealing packing (such as graphite packing, PTFE packing); regularly add lubricating grease to the rotating part of the valve stem (if there is a grease injection port in the design) to ensure smooth operation.
- Long - Term Idle: When the valve is not used for a long time, place it in the fully open or fully closed position (to prevent long - term extrusion deformation of the butterfly plate and the valve seat), clean the medium inside the valve, and do a good job of protection (such as covering for dust and rust prevention). Before re - using, manually open and close it several times to check the performance.
This manual soft - sealed wafer - type butterfly valve, with the advantages of convenient operation, reliable sealing, and flexible installation, has become a common valve for medium on - off and simple flow regulation in municipal, civil, and general industrial pipeline systems, meeting the basic control requirements of multiple scenarios
Packaging & Shipping
Company Profile
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Driven by a relentless pursuit of perfection, Tianjin Auswell Valve Co., Ltd. has significantly bolstered its management framework in recent years to meet and anticipate our clients' needs. We've proudly garnered the prestigious ISO9001 Quality Management System Certification and the esteemed British WARS Drinking Water Certification. Our product offerings, celebrated for their reliability, have made their mark across Europe, Asia, Africa, and beyond, earning widespread acclaim and trust from our clientele. Upholding our commitment to quality, we at Auswell Valve Co., Ltd. are eager to collaborate fully with peers in the valve industry. Together, we strive to elevate Chinese craftsmanship onto the global stage.
Tianjin Auswell Valve Co., Ltd. It is nestled in a storied historical town in China, a place celebrated for its rich military legacy and famed for its rice cultivation. Industrial Park, Xiaozhan Town, Jinnan District, Tianjin. Here, our company boasts comprehensive production capabilities, from innovative product design and precise mold manufacturing to advanced machining, meticulous rubber smelting, epoxy spraying, and rigorous valve assembly and testing.
With state-of-the-art processing equipment and exquisite craftsmanship, we assure that every product aligns with national or international standards, reflecting our commitment to excellence. Our dedication to superior craftsmanship ensures that we deliver only the highest quality products to our valued customers.
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Driven by a relentless pursuit of perfection, Tianjin Auswell Valve Co., Ltd. has significantly bolstered its management framework in recent years to meet and anticipate our clients' needs. We've proudly garnered the prestigious ISO9001 Quality Management System Certification and the esteemed British WARS Drinking Water Certification. Our product offerings, celebrated for their reliability, have made their mark across Europe, Asia, Africa, and beyond, earning widespread acclaim and trust from our clientele. Upholding our commitment to quality, we at Auswell Valve Co., Ltd. are eager to collaborate fully with peers in the valve industry. Together, we strive to elevate Chinese craftsmanship onto the global stage.
After Sales Service
Our advantage :Hoswell valve company distinguishes itself with a comprehensive set of strengths. We possess in - house independent R & D capabilities, backed by state - of - the - art processing equipment. Our manufacturing processes adhere to industry - leading standards, and we operate a rigorous quality control system.
Product Quality Assurance
Quality Commitment and Inspection: Before leaving the factory, valves need to undergo strict quality inspections, such as pressure tests, sealing tests, etc. It is ensured that there are no casting defects like sand holes or air holes in the valves, and there are no bruises or scratches on the flange sealing surfaces. The markings of flow rate, direction, nominal pressure, diameter, material, etc. are clear and complete. It is promised that the valves are produced and inspected in accordance with national standards, and unqualified products will not leave the factory.
Warranty Period Service: Provide a certain period of warranty service. During the warranty period, for malfunctions caused by product quality problems, the manufacturer will repair or replace parts free of charge.
Technical Support
Pre-sales Consultation: Before customers purchase valves, provide them with professional technical consultations, including suggestions on product selection, specification parameters, material characteristics, applicable working conditions, etc., to help customers choose the most suitable valve products.
Installation Guidance: Provide installation guidance services, which can be carried out online (such as by phone, video, installation manuals, etc.) or offline (by sending technicians to the site) to ensure that the valves are installed correctly and avoid problems caused by improper installation.
Usage Training: Provide usage training for customer operators, enabling them to be familiar with the operation methods of the valves, key maintenance points, knowledge of troubleshooting common faults, etc., and improving the customers' ability to use and maintain the valves.
Supply of Maintenance Parts: Ensure the timely supply of maintenance parts. For the damage of parts outside the warranty period, provide the parts at a reasonable price (such as the cost price).
Regular Follow-up Visits: Regularly conduct follow-up visits to customers, understand the usage situation of the valves, and collect customers' feedback opinions, so as to improve the products and services.
FAQ
1) Q: Are you a manufacturer or trading company?
A: Hoswell Valve is a professional valve manufacturer with experienced R&D team.
2) Q: Do you have any agent or representative abroad?
A: Yes, we have agents in some countries, they can offer local service for you.
3) Q: What kinds of valve can you supply?
A: We can supply butterfly valve, ball valve, check valve and so on.
4) Q: Do you have any certificate for the valves?
A: Yes, we have CE, BV, ATEX, TS and so on.
5) Q: What's the delivery time?
A: If all the parts of the valve are ready in stock, the valves can be delivered within 7~10 days.
6) Q: What are the countries or regions you supply valves?
A: Hoswell valves have been supplied to USA, Europe, Australia, Singapore, South Africa and so on.
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